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🩺 Medically reviewed by the Health Decoded Guide Editorial Team
🔍 Quick Summary
A vaginal yeast infection (candidiasis) is a common fungal infection caused by an overgrowth of Candida, a type of yeast that normally lives in the vagina.
It often causes intense itching, irritation, burning, and a thick white discharge. Most infections improve with antifungal treatment.
1️⃣ Introduction
A vaginal yeast infection, also called vaginal candidiasis, is one of the most common causes of vaginal discomfort.
Normally, healthy bacteria and yeast live together in the vagina without causing problems. When this natural balance changes, yeast can grow too much and cause symptoms.
• caused by an overgrowth of Candida yeast
• common in women of all ages
• usually not considered a sexually transmitted infection (STI)
👉 Most women experience at least one yeast infection during their lifetime.
2️⃣ How it happens
The vagina naturally contains bacteria and small amounts of yeast.
Healthy bacteria help keep yeast under control.
When the balance changes, yeast multiplies rapidly and causes inflammation.
• normal protective bacteria decrease
• yeast grows excessively
• inflammation develops in the vaginal tissues
👉 Symptoms are caused by the body's inflammatory response to the overgrowth—not because the yeast is "new."
3️⃣ Common causes
• Antibiotic use
- kills protective bacteria
- allows yeast to multiply
• Hormonal changes
- pregnancy
- birth control containing estrogen
• Diabetes
- high blood sugar encourages yeast growth
- poorly controlled diabetes increases risk
• Weakened immune system
- illnesses affecting immunity
- certain medications
👉 Having a yeast infection does not necessarily mean poor hygiene or sexual activity caused it.
4️⃣ Common symptoms
• intense vaginal itching
• burning around the vulva
• redness and swelling
• thick white discharge that may look like cottage cheese
• pain during sex
• burning during urination when urine touches irritated skin
👉 Some women have severe itching even with very little discharge.
5️⃣ How it differs from other vaginal infections
Yeast infections are often confused with other conditions.
• Yeast infection
- thick white discharge
- intense itching
- little or no odor
• Bacterial vaginosis
- thin gray-white discharge
- fishy smell
- itching often mild or absent
• Trichomoniasis
- yellow-green frothy discharge
- unpleasant odor
- may cause pain during urination
👉 The symptoms can overlap, so medical assessment may sometimes be needed.
6️⃣ Associated symptoms
Some women may also notice:
• soreness when walking
• tiny skin cracks around the vulva
• irritation after sex
• symptoms becoming worse before menstruation
👉 Recurrent yeast infections deserve medical evaluation to look for an underlying cause.
7️⃣ When it becomes dangerous 🚨
Seek medical attention if:
• symptoms occur during pregnancy
• symptoms keep returning (4 or more infections each year)
• severe pain or fever develops
• sores, blisters, or ulcers appear
• symptoms do not improve after treatment
👉 These may indicate:
• another vaginal infection or STI
• diabetes or another underlying medical condition
8️⃣ Management / Treatment
Treatment depends on the severity of the infection.
• antifungal vaginal creams or pessaries (many are available without a prescription)
• oral antifungal medication in selected cases (usually prescribed by a healthcare worker)
• avoid washing inside the vagina (douching)
• wear breathable cotton underwear
• keep diabetes well controlled if present
👉 Avoid using antibiotics unless prescribed, as unnecessary use can increase the risk of yeast infections.
9️⃣ Diagnosis
Doctors may diagnose a yeast infection by:
• discussing symptoms
• performing a pelvic examination if needed
• examining a vaginal sample under a microscope
• sending laboratory tests if infections keep returning
👉 Not every vaginal discharge is caused by a yeast infection, so self-treatment is not always the best option.
🟢 Important message
Vaginal yeast infections are common, treatable, and usually not serious.
Getting the correct diagnosis helps ensure you receive the right treatment and avoid unnecessary medications.
👉 Persistent or recurrent symptoms should always be medically evaluated.
FAQ
• Is a yeast infection an STI?
No. Most vaginal yeast infections are not sexually transmitted.
• Can antibiotics cause a yeast infection?
Yes. Antibiotics may reduce the healthy bacteria that normally keep yeast under control.
• Can men get Candida?
Yes. Although less common, Candida can affect the penis, especially after sexual contact or in people with diabetes.
• Can I get a yeast infection during pregnancy?
Yes. Hormonal changes during pregnancy increase the risk.
• Can yeast infections come back?
Yes. Some women experience recurrent infections that require further medical assessment.
🔗 Related Health Topics
• Vaginal Discharge
• Bacterial Vaginosis
• Trichomoniasis
• Vaginal Itching
• Safe Sex and Reproductive Health
📚 Medical References
• World Health Organization (WHO). Sexual and reproductive health.
• National Health Service (NHS). Vaginal thrush.
• Centers for Disease Control and Prevention (CDC). Vulvovaginal candidiasis.
• Mayo Clinic. Yeast infection (vaginal).
• National Institute for Health and Care Excellence (NICE). Vulvovaginal candidiasis.
• American College of Obstetricians and Gynecologists (ACOG). Vaginitis guidance.
⚠️ Medical Disclaimer
This article is for educational purposes only and does not replace professional medical advice.
If you have symptoms or concerns, please consult a qualified healthcare professional.